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<div class="refentry" title="alwayson">
<a id="alwayson"></a>
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<a id="Indexalwayson" class="indexterm"></a>
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<h2>
<span class="refentrytitle">alwayson</span>
</h2>
<p>alwayson —
Activates the indicated instrument in the orchestra header,
without need for an i statement.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp13446288"></a>
<h2>Description</h2>
<p>
Activates the indicated instrument in the orchestra header,
without need for an i statement. Instruments must be
activated in the same order as they are defined.
</p>
<p>
The alwayson opcode is designed to simplify
the definition of re-usable orchestras with
signal processing or effects chains and networks.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp13433984"></a>
<h2>Syntax</h2>
<pre class="synopsis"> <span class="command"><strong>alwayson</strong></span> Tinstrument [p4, ..., pn]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp13435096"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>Tinstrument</em></span> -- String name of the instrument definition to be turned on.
</p>
<p>
<span class="emphasis"><em>[p4, ..., pn]</em></span> -- Optional pfields to be passed to the instrument, in the same
order and type as if this were an i statement.
</p>
<p>
When the instrument is activated, p1 is the insno, p2 is 0, and p3 is -1.
Pfields from p4 on may optionally be sent to the instrument.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp13527944"></a>
<h2>Examples</h2>
<p>
Here is an example of the alwayson opcode. It uses the file <a class="ulink" href="examples/alwayson.csd" target="_top"><em class="citetitle">alwayson.csd</em></a>.
</p>
<div class="example">
<a id="idp13528896"></a>
<p class="title">
<strong>Example 45. Example of the alwayson opcode.</strong>
</p>
<div class="example-contents">
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac <span class="comment">;;;RT audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if RT audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">;-Wfo alwayson.wav </span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; Initialize the global variables. </span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="comment">; Connect up instruments and effects to create the signal flow graph. </span>
<span class="opc">connect</span> "SimpleSine", "leftout", "Reverberator", "leftin"
<span class="opc">connect</span> "SimpleSine", "rightout", "Reverberator", "rightin"
<span class="opc">connect</span> "Moogy", "leftout", "Reverberator", "leftin"
<span class="opc">connect</span> "Moogy", "rightout", "Reverberator", "rightin"
<span class="opc">connect</span> "Reverberator", "leftout", "Compressor", "leftin"
<span class="opc">connect</span> "Reverberator", "rightout", "Compressor", "rightin"
<span class="opc">connect</span> "Compressor", "leftout", "Soundfile", "leftin"
<span class="opc">connect</span> "Compressor", "rightout", "Soundfile", "rightin"
<span class="comment">; Turn on the "effect" units in the signal flow graph. </span>
<span class="opc">alwayson</span> "Reverberator", 0.91, 12000
<span class="opc">alwayson</span> "Compressor"
<span class="opc">alwayson</span> "Soundfile"
<span class="comment">; Define instruments and effects in order of signal flow.</span>
<span class="oblock">instr</span> SimpleSine
<span class="comment">;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;</span>
<span class="comment">; Default values: p1 p2 p3 p4 p5 p6 p7 p8 p9 p10</span>
<span class="opc">pset</span> 0, 0, 10, 0, 0, 0, 0.5
iattack <span class="op">=</span> 0.015
idecay <span class="op">=</span> 0.07
isustain <span class="op">=</span> p3
irelease <span class="op">=</span> 0.3
p3 <span class="op">=</span> iattack <span class="op">+</span> idecay <span class="op">+</span> isustain <span class="op">+</span> irelease
adamping <span class="opc">linsegr</span> 0.0, iattack, 1.0, idecay <span class="op">+</span> isustain, 1.0, irelease, 0.0
iHz <span class="op">=</span> <span class="opc">cpsmidinn</span>(p4)
<span class="comment">; Rescale MIDI velocity range to a musically usable range of dB. </span>
iamplitude <span class="op">=</span> <span class="opc">ampdb</span>(p5 <span class="op">/</span> 127 <span class="op">*</span> 15.0 <span class="op">+</span> 60.0)
<span class="comment">; Use ftgenonce instead of ftgen, ftgentmp, or f statement. </span>
icosine <span class="opc">ftgenonce</span> 0, 0, 65537, 11, 1
aoscili <span class="opc">oscili</span> iamplitude, iHz, icosine
aadsr <span class="opc">madsr</span> iattack, idecay, 0.6, irelease
asignal <span class="op">=</span> aoscili <span class="op">*</span> aadsr
aleft, aright <span class="opc">pan2</span> asignal, p7
<span class="comment">; Stereo audio output to be routed in the orchestra header. </span>
<span class="opc">outleta</span> "leftout", aleft
<span class="opc">outleta</span> "rightout", aright
<span class="oblock">endin</span>
<span class="oblock">instr</span> Moogy
<span class="comment">;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;</span>
<span class="comment">; Default values: p1 p2 p3 p4 p5 p6 p7 p8 p9 p10</span>
<span class="opc">pset</span> 0, 0, 10, 0, 0, 0, 0.5
iattack <span class="op">=</span> 0.003
isustain <span class="op">=</span> p3
irelease <span class="op">=</span> 0.05
p3 <span class="op">=</span> iattack <span class="op">+</span> isustain <span class="op">+</span> irelease
adamping <span class="opc">linsegr</span> 0.0, iattack, 1.0, isustain, 1.0, irelease, 0.0
iHz <span class="op">=</span> <span class="opc">cpsmidinn</span>(p4)
<span class="comment">; Rescale MIDI velocity range to a musically usable range of dB. </span>
iamplitude <span class="op">=</span> <span class="opc">ampdb</span>(p5 <span class="op">/</span> 127 <span class="op">*</span> 20.0 <span class="op">+</span> 60.0)
<span class="opc">print</span> iHz, iamplitude
<span class="comment">; Use ftgenonce instead of ftgen, ftgentmp, or f statement. </span>
isine <span class="opc">ftgenonce</span> 0, 0, 65537, 10, 1
asignal <span class="opc">vco</span> iamplitude, iHz, 1, 0.5, isine
kfco <span class="opc">line</span> 2000, p3, 200
krez <span class="op">=</span> 0.8
asignal <span class="opc">moogvcf</span> asignal, kfco, krez, 100000
asignal <span class="op">=</span> asignal <span class="op">*</span> adamping
aleft, aright <span class="opc">pan2</span> asignal, p7
<span class="comment">; Stereo audio output to be routed in the orchestra header. </span>
<span class="opc">outleta</span> "leftout", aleft
<span class="opc">outleta</span> "rightout", aright
<span class="oblock">endin</span>
<span class="oblock">instr</span> Reverberator
<span class="comment">;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;</span>
<span class="comment">; Stereo input. </span>
aleftin <span class="opc">inleta</span> "leftin"
arightin <span class="opc">inleta</span> "rightin"
idelay <span class="op">=</span> p4
icutoff <span class="op">=</span> p5
aleft, aright <span class="opc">reverbsc</span> aleftin, arightin, idelay, icutoff
<span class="comment">; Stereo output. </span>
<span class="opc">outleta</span> "leftout", aleft
<span class="opc">outleta</span> "rightout", aright
<span class="oblock">endin</span>
<span class="oblock">instr</span> Compressor
<span class="comment">;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;</span>
<span class="comment">; Stereo input. </span>
aleftin <span class="opc">inleta</span> "leftin"
arightin <span class="opc">inleta</span> "rightin"
kthreshold <span class="op">=</span> 25000
icomp1 <span class="op">=</span> 0.5
icomp2 <span class="op">=</span> 0.763
irtime <span class="op">=</span> 0.1
iftime <span class="op">=</span> 0.1
aleftout <span class="opc">dam</span> aleftin, kthreshold, icomp1, icomp2, irtime, iftime
arightout <span class="opc">dam</span> arightin, kthreshold, icomp1, icomp2, irtime, iftime
<span class="comment">; Stereo output. </span>
<span class="opc">outleta</span> "leftout", aleftout
<span class="opc">outleta</span> "rightout", arightout
<span class="oblock">endin</span>
<span class="oblock">instr</span> Soundfile
<span class="comment">;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;</span>
<span class="comment">; Stereo input. </span>
aleftin <span class="opc">inleta</span> "leftin"
arightin <span class="opc">inleta</span> "rightin"
<span class="opc">outs</span> aleftin, arightin
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; It is not necessary to activate "effects" or create f-tables in the score! </span>
<span class="comment">; Overlapping notes create new instances of instruments with proper connections. </span>
<span class="stamnt">i</span> "S<span class="stamnt">i</span>mpleS<span class="stamnt">i</span>ne" 1 5 60 85
<span class="stamnt">i</span> "S<span class="stamnt">i</span>mpleS<span class="stamnt">i</span>ne" 2 5 64 80
<span class="stamnt">i</span> "Moogy" 3 5 67 75
<span class="stamnt">i</span> "Moogy" 4 5 71 70
<span class="comment">; 1 extra second after the performance</span>
<span class="stamnt">e</span> 1
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp13529920"></a>
<h2>Credits</h2>
<p>By: Michael Gogins 2009</p>
</div>
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